DevelopingModels
Artificial Analysis Index v5 puts Claude Opus 5.5 first at 58 and widens the open-model gap to 12 points
Artificial Analysis published Intelligence Index v5 on Oct. 27, with 60% of the index on private test sets or held-out answers. Claude Opus 5.5 (max) scores 58, GPT-6 Astra 57, GPT-6.1 Sol 55. The gap between top open-weights and closed models grew from 3 to 12 points; the top model with released weights scores 32.
- HEAT
- OUTLETS
- 5
- NEW IN 6H
- +4
- FIRST SEEN
- LAST SIGNAL
Primary source
Artificial Analysisartificialanalysis.ai/articles/artificial-analysis-intelligence-index-v5Coverage · 5 articles, oldest first
Wednesday, October 28, 2026
Interconnects AI
interconnects.ai/p/artificial-analysis-v5-and-the-benchmarkers